@Knight Sorry but only citing what Mordred can do is not good enough, at all. Especially when those skills pale in comparison to Arturia's or other renowed legends. Let's analyze them one by one.
1.
Precognition - If you think Mordred's precog is even near Arturia's, you're gravely mistaken. Arturia's Precog is A Rank, meaning it actually is precognition of the highest level in Fate verse. Mordred's B Rank precog is quite inferior to it and it's more akin to a small sixth sense than actual precognition (in terms of showing images of the battle to come). She can sense unseen danger and block out audiovisual interferences.
2.
Battle Continuation - Mordred has B Rank on this one. Compare it to Cu Chulain (A Rank), he was rendered unable to continue when he impaled himself and only managed to skewer an unsuspecting Kirei and falling to his demise afterwards. Mordred was only only to survive after getting impaled in her guts by Rhongomyniad because of her burning hatred for Arturia. And when I say burning, I mean pure animalistic rage. That along with the fact that she was under a strong curse to kill Arturia made her keep going (I'm guessing courtesy of Morgan le Fay).
Mordred was bound by a strong curse, so he still swung his sword even after his death and left a fatal wound on the king. That is the end of this battle. | | |
| ~ Fate Route, Day 14, Temporary Dream/What I've Gained | |
3.
Magic Resistance - While she does have resistance, it's still lower than Arturia's. And I'll also point out that Erza doesn't need magical attacks to fight efficiently.
4.
Experience / Skill - This isn't gonna fly. Mordred is not as skilled as people make her out to be. Certainly not as skilled as Arturia or any of the other Knight of The Round Table for that matter. She only had her way with Britain because of Morgan's plotting and the fact that Arturia departed for Rome along with her soldiers. She was defeated in single combat by Arturia without a single scratch and she fell only because of a last moment fatal attack spurred by the curse Mordred had. And she also got manhandled by Siegfried and barely hold on.
Her swordsmanship is unrefined and for lack of a better word, barbaric. She also lacks discipline and is easily enraged. These traits would fly against a brawler but against a methodical swordsman like Erza they won't. Just to clarify, I'm not saying Mordred is unskilled, she definitely is. She is a Knight of the Round Table after all and demonstrated her skill before joining them (even though she joined with Morgan's recommendation). It's just that when it comes to skill in the Round Table, she isn't the sharpest tool in the shed.
Unless you have any other arguments,
I'm going with Erza for what I've said above.